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18419129 is a prime number
BaseRepresentation
bin100011001000…
…0110110111001
31021122210021222
41012100312321
514203403004
61454441425
7312363041
oct106206671
937583258
1018419129
11a440623
126203275
133a7b9c1
142636721
15193c7be
hex1190db9

18419129 has 2 divisors, whose sum is σ = 18419130. Its totient is φ = 18419128.

The previous prime is 18419119. The next prime is 18419161. The reversal of 18419129 is 92191481.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17472400 + 946729 = 4180^2 + 973^2 .

It is a cyclic number.

It is not a de Polignac number, because 18419129 - 220 = 17370553 is a prime.

It is not a weakly prime, because it can be changed into another prime (18419119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9209564 + 9209565.

It is an arithmetic number, because the mean of its divisors is an integer number (9209565).

Almost surely, 218419129 is an apocalyptic number.

It is an amenable number.

18419129 is a deficient number, since it is larger than the sum of its proper divisors (1).

18419129 is an equidigital number, since it uses as much as digits as its factorization.

18419129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 35.

The square root of 18419129 is about 4291.7512742469. The cubic root of 18419129 is about 264.0926796196.

The spelling of 18419129 in words is "eighteen million, four hundred nineteen thousand, one hundred twenty-nine".